well, the leading case is/was Hedley Byrne and Heller, and it concerned liability for negligent misstatement - in a reference coincidentally
and surprise surprise, the referee was found responsible for losses
That is in my opinion you become liable for the landlord's losses.
The only issue is whether you or your company would be liable, and i think the law has changed appreciably over the last 30 yrs and it used to be you and now it is the company
SOmeone can improve on this
The only other thing is that Hedley etc was about negligent misstatement and your would be an intentional mistatement ...so is your case distinct from H ? Well it might be, but more so if you get my meaning - that is it is a different case but you would still be liable
SO it is easy for you:
tell your employee - the law says I cant
or if you are in a talky mood - the law says I cant because I make myself liable for any losses the landlord suffers.
pp